Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (4): 484-490.DOI: 10.11944/j.issn.1000-0518.2018.04.170107

• Full Paper • Previous Articles    

Preparation and Application of Bisphenol-A TiO2 Gel Molecularly Imprinted Electrochemical Sensor Based on the Sensitivity-Enhancement of Gold Nanoparticles

Lingling LI,Shaoming YANG(),Shaoqing DING,Peiling SHANG,Jie YANG,Qiang CAO,Wenling ZHA   

  1. School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China
  • Received:2017-04-12 Accepted:2017-06-23 Published:2018-03-30 Online:2018-04-02
  • Contact: Shaoming YANG
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21465012), Natural Science Foundation of Jiangxi Province of China(No.20171BAB203017), Scientific Research Fund of Jiangxi Provincial Education Department(No.GJJ150544), Scientific Research Project of East China Jiaotong University(No.15LX03)


A bisphenol-A(BPA) TiO2 gel molecularly imprinted electrochemical sensor was fabricated using gold nanoparticles(AuNPs) as sensitivity-enhanced materials based on surface sol-gel and self-assembly methods. AuNPs were characterized by scanning electron microscopy(SEM) and energy dispersive spectroscopy. BPA, TiO2 gel, and BPA-imprinted TiO2 gel were characterized by Fourier transform infrared(FTIR) spectrometry. Under optimal conditions, the sensor exhibits a good linear response from 1.0×10-8 to 1.0×10-5 mol/L for bisphenol A, with correlation coefficient 0.995 and a low detection limit of 0.6×10-8 mol/L(S/N=3). The prepared sensor was successfully applied in the detection of actual sample with 97.4%~103% recoveries.

Key words: gold nanoparticles, bisphenol A, TiO2, sol-gel method, self-assembly method, molecularly imprinted sensor